Having worked on the BCU for 2 years I can honestly say it is a vital cog in safety, a Nimrod went down about one year after I arrived at RAF Kinloss in 1983 due to ingestion of a flock of about 400 seabirds. A New Zealand Air Force pilot on a secondment lost his life, the birds were cleared from the middle of the runway but settled at the end of the runway, the result was they lifted as the aircraft rotated and the aircraft crashed in the Rozelle woods. Keep the birds away, for their sake as much as the human costs, if you think air safety is expensive try an accident.